|Scientists Discover Two New Species of Ancient,Burrowing Mammal Ancestors-120-million-year-old animals evolved“scratch digging”traits independently

A joint research team led by Dr.MAO Fangyuan and Dr.ZHANG Chi from the Institute of Vertebrate Paleontology and Paleoanthropology(IVPP)of the Chinese Academy of Sciences and Prof.MENG Jin from the American Museum of Natural History have discovered two new species of mammal-like,burrowing animals that lived about 120 million years ago in what is now northeastern China.